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https://issues.apache.org/jira/browse/HDFS-11753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15997847#comment-15997847
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Doris Gu commented on HDFS-11753:
---------------------------------
Add relationship with https://issues.apache.org/jira/browse/HDFS-3723
> Make Some Enhancements about JournalNode Daemon
> ------------------------------------------------
>
> Key: HDFS-11753
> URL: https://issues.apache.org/jira/browse/HDFS-11753
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: journal-node
> Affects Versions: 3.0.0-alpha2
> Reporter: Doris Gu
> Attachments: HDFS-11753.001.patch
>
>
> 1.Add support -h. Right now, if I use *hdfs journalnode -h* , I straightly
> start journalnode daemon. But generally speakingļ¼ I just want to look at the
> usage.
> 2.Add exception catch and termination. If I start journalnode with different
> directions stored pids, I get servel journalnode daemons that don't work for
> I config the same port.
> {quote}[hdfs@localhost ~]$ jps
> *10107 JournalNode*
> *46023 JournalNode*
> 57944 NameNode
> 46539 Jps
> 57651 DFSZKFailoverController
> 57909 DataNode
> *57739 JournalNode*
> *45721 JournalNode*{quote}
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